Abstract
For a dynamically disordered continuum it is found that the exact quantum mechanical mean square displacement , for . A Gaussian white-noise spectrum is assumed for the random potential. The result differs qualitatively from the diffusive behavior well known for the one-band lattice Hamiltonian, and is understandable in terms of the momentum cutoff inherent in the lattice, simulating a "momentum bath."
- Received 10 December 1981
DOI:https://doi.org/10.1103/PhysRevLett.48.553
©1982 American Physical Society